MULTI-STAGE MAGNETIC RESONANCE RECONSTRUCTION FOR PARALLEL IMAGING APPLICATIONS
    1.
    发明申请
    MULTI-STAGE MAGNETIC RESONANCE RECONSTRUCTION FOR PARALLEL IMAGING APPLICATIONS 有权
    并行成像应用的多级磁共振重建

    公开(公告)号:US20140133724A1

    公开(公告)日:2014-05-15

    申请号:US14054003

    申请日:2013-10-15

    IPC分类号: G06T11/00

    CPC分类号: G01R33/5611

    摘要: A computer-implemented method for reconstruction of a magnetic resonance image includes acquiring a first incomplete k-space data set comprising a plurality of first k-space lines spaced according to an acceleration factor and one or more calibration lines. A parallel imaging reconstruction technique is applied to the first incomplete k-space data to determine a plurality of second k-space lines not included in the first incomplete k-space data set, thereby yielding a second incomplete k-space data set. Then, the parallel imaging reconstruction technique is applied to the second incomplete k-space data to determine a plurality of third k-space lines not included in the second incomplete k-space data, thereby yielding a complete k-space data set.

    摘要翻译: 用于重建磁共振图像的计算机实现的方法包括获取包括根据加速因子和一个或多个校准线间隔开的多个第一k空间线的第一不完整k空间数据集。 将并行成像重建技术应用于第一不完整k空间数据以确定未包括在第一不完整k空间数据集中的多个第二k空间线,从而产生第二不完整k空间数据集。 然后,将并行成像重构技术应用于第二不完整k空间数据,以确定不包括在第二不完整k空间数据中的多个第三k空间线,从而产生完整的k空间数据集。

    Multi-stage magnetic resonance reconstruction for parallel imaging applications
    2.
    发明授权
    Multi-stage magnetic resonance reconstruction for parallel imaging applications 有权
    并行成像应用的多级磁共振重建

    公开(公告)号:US09097780B2

    公开(公告)日:2015-08-04

    申请号:US14054003

    申请日:2013-10-15

    IPC分类号: G06K9/00 G01R33/561

    CPC分类号: G01R33/5611

    摘要: A computer-implemented method for reconstruction of a magnetic resonance image includes acquiring a first incomplete k-space data set comprising a plurality of first k-space lines spaced according to an acceleration factor and one or more calibration lines. A parallel imaging reconstruction technique is applied to the first incomplete k-space data to determine a plurality of second k-space lines not included in the first incomplete k-space data set, thereby yielding a second incomplete k-space data set. Then, the parallel imaging reconstruction technique is applied to the second incomplete k-space data to determine a plurality of third k-space lines not included in the second incomplete k-space data, thereby yielding a complete k-space data set.

    摘要翻译: 用于重建磁共振图像的计算机实现的方法包括获取包括根据加速因子和一个或多个校准线间隔开的多个第一k空间线的第一不完整k空间数据集。 将并行成像重建技术应用于第一不完整k空间数据以确定未包括在第一不完整k空间数据集中的多个第二k空间线,从而产生第二不完整k空间数据集。 然后,将并行成像重构技术应用于第二不完整k空间数据,以确定不包括在第二不完整k空间数据中的多个第三k空间线,从而产生完整的k空间数据集。

    Non-Contrast-Enhanced 4D MRA Using Compressed Sensing Reconstruction
    6.
    发明申请
    Non-Contrast-Enhanced 4D MRA Using Compressed Sensing Reconstruction 有权
    使用压缩感知重建的非对比度增强型4D MRA

    公开(公告)号:US20130121550A1

    公开(公告)日:2013-05-16

    申请号:US13284143

    申请日:2011-10-28

    IPC分类号: G06T11/00 A61B5/055

    摘要: A reconstructed image is rendered of a patient by a processor from a set of undersampled MRI data by first subtracting two repetitions of the acquired data in k-space to create a third dataset. The processor reconstructs the image by minimizing an objective function under a constraint related to the third dataset, wherein the objective function includes applying a Karhunen-Loeve Transform (KLT) to a temporal dimension of data. The objective function under the constraint is expressed as arg minf{∥φ(f)∥1 subject to ∥Af−y∥2≦ε}. The reconstructed image is an angiogram which may be a 4D angiogram. The angiogram is used to diagnose a vascular disease.

    摘要翻译: 通过首先在k空间中减去所获取的数据的两次重复以创建第三数据集,由处理器从一组欠采样的MRI数据中呈现患者的重建图像。 处理器通过在与第三数据集相关的约束下最小化目标函数来重建图像,其中目标函数包括将Karhunen-Loeve变换(KLT)应用于数据的时间维度。 约束下的目标函数表示为arg minf {∥phi(f)‖1,受∥Af-y‖2@ epsilon}的限制。 重建的图像是可以是4D血管造影的血管造影。 血管造影用于诊断血管疾病。

    Dynamic image reconstruction with tight frame learning
    8.
    发明授权
    Dynamic image reconstruction with tight frame learning 有权
    动态图像重建与紧帧学习

    公开(公告)号:US09453895B2

    公开(公告)日:2016-09-27

    申请号:US14027451

    申请日:2013-09-16

    IPC分类号: G01R33/48 G06T5/50 G01R33/561

    摘要: A computer-implemented method for learning a tight frame includes acquiring undersampled k-space data over a time period using an interleaved process. An average of the undersampled k-space data is determined and a reference image is generated based on the average of the undersampled k-space data. Next, a tight frame operator is determined based on the reference image. Then, a reconstructed image data is generated from the undersampled k-space data via a sparse reconstruction which utilizes the tight frame operator.

    摘要翻译: 用于学习紧帧的计算机实现的方法包括使用交错处理在一段时间内获取欠采样的k空间数据。 确定欠采样的k空间数据的平均值,并且基于欠采样的k空间数据的平均值生成参考图像。 接下来,基于参考图像确定紧帧运算符。 然后,通过使用紧帧运算符的稀疏重构,从欠采样的k空间数据生成重建的图像数据。

    Dynamic Image Reconstruction with Tight Frame Learning
    9.
    发明申请
    Dynamic Image Reconstruction with Tight Frame Learning 有权
    动态图像重建与紧帧学习

    公开(公告)号:US20140097845A1

    公开(公告)日:2014-04-10

    申请号:US14027451

    申请日:2013-09-16

    IPC分类号: G01R33/48 G06T5/50

    摘要: A computer-implemented method for learning a tight frame includes acquiring undersampled k-space data over a time period using an interleaved process. An average of the undersampled k-space data is determined and a reference image is generated based on the average of the undersampled k-space data. Next, a tight frame operator is determined based on the reference image. Then, a reconstructed image data is generated from the undersampled k-space data via a sparse reconstruction which utilizes the tight frame operator.

    摘要翻译: 用于学习紧帧的计算机实现的方法包括使用交错处理在一段时间内获取欠采样的k空间数据。 确定欠采样的k空间数据的平均值,并且基于欠采样的k空间数据的平均值生成参考图像。 接下来,基于参考图像确定紧帧运算符。 然后,通过使用紧帧运算符的稀疏重构,从欠采样的k空间数据生成重建的图像数据。

    Method and device for phase-sensitive flow measurement by a magnetic resonance
    10.
    发明授权
    Method and device for phase-sensitive flow measurement by a magnetic resonance 有权
    通过磁共振对相敏流量测量的方法和装置

    公开(公告)号:US08798942B2

    公开(公告)日:2014-08-05

    申请号:US12975840

    申请日:2010-12-22

    CPC分类号: G01R33/56316 G01R33/56383

    摘要: In a method and a device for phase-sensitive flow measurement of a volume segment of an examination subject in a measurement system, the volume segment is divided into multiple partial volume segments and the following steps are executed repeatedly until the volume segment has been completely measured: movement of a table such that a center of one of the partial volume segments to be measured essentially corresponds to the isocenter of the magnetic resonance system, and implementation of the phase-sensitive flow measurement for the partial volume segment to be measured while the center of the partial volume segment essentially corresponds to the isocenter.

    摘要翻译: 在用于测量系统中的检查对象的体积段的相敏度流量测量的方法和装置中,将体积段划分成多个部分体积段,并且重复执行以下步骤,直到体积段已被完全测量 :使得要测量的部分体积段中的一个的中心基本上对应于磁共振系统的等角点的台的移动,以及在中心处测量的部分体积段的相敏流测量的实现 的部分体积段基本上对应于等角点。